.PHONY:all
all:async
async:async.cpp
	g++ -std=c++11 @^ -o $@ 
promise:promise.cpp
	g++ -std=c++11 @^ -o $@ 
packaged_task:packaged_task.cpp
	g++ -std=c++11 @^ -o $@ 
.PHONY:clean
clean:
	rm -f async